Hey java devs, somebody built a REPL! It even runs in the browser, nothing to install or configure (or curse at). I love this thing for when I can’t remember which function accepts a null parameter and which one freaks out and throws a null pointer exception, it’s so helpful.

There is a REPL in Java 9, but we haven’t even switched to 8 yet at work (always let someone else try the new stuff first :) ). If you’re not exactly on the cutting edge either, try the online REPL, it’s awesome.